RN104: ghost “NG-8TB-Seagate” volume (RAID unknown) flapping Inactive/Unprotected

Hi all,

I have a ReadyNAS RN104 that’s working fine from the data point of view, but the volume configuration seems corrupted and is generating constant volume health alerts that I cannot clear. I’m hoping someone familiar with the ReadyNAS OS 6 config DB can advise on a safe way to remove the ghost volume entries without wiping any data.

Hardware / firmware:

• Model: RN104
• OS version: 6.10.10
• Disks:
  • sda: 2 TB (NG-WDRED-2TB-1)
  • sdb: 6 TB (NG-WDRP-6TB-1)
  • sdc: 3 TB (NG-WDRED-3TB-2)
  • sdd: 8 TB (NG-8TB-Seagate) – recently replaced a failed 3 TB

Symptom:
In the web UI → System → Volumes I see 6 volumes even though I only have 4 disks. The top four are green JBOD volumes with data and look healthy:

• NG-8TB-Seagate (JBOD, ~7.27 TB, ~2.64 TB used)
• NG-WDRED-3TB-2 (JBOD, ~2.72 TB, ~1.17 TB used)
• NG-WDRP-6TB-1 (JBOD, ~5.45 TB, ~4.28 TB used)
• NG-WDRED-2TB-1 (JBOD, ~1.81 TB, ~0.2 TB used)

Below those, there are two blue entries with 0 data and “RAID unknown”:

• NG-WDRED-3TB-1 (0 data, 0 free, RAID unknown)
• NG-8TB-Seagate (0 data, 0 free, RAID unknown)

I believe these are stale/ghost volumes from the old failed 3 TB drive and some mis-step when I first added the 8 TB. They show only “Disk test” and “Destroy” as options. When I try “Destroy” on the old 3 TB entry, it appears to succeed but the entry comes straight back.

In the logs I constantly get messages like:

• “Volume: Volume NG-8TB-Seagate health changed from Inactive to Unprotected.”
• “Volume: Volume NG-8TB-Seagate health changed from Unprotected to Inactive.”

These repeat every few seconds/minutes and are clearly coming from the ghost NG-8TB-Seagate entry (the 0-data, RAID-unknown one), not the real 8 TB JBOD volume which is mounted and in use.

SSH diagnostics (all arrays look clean):

lsblk
sda 1.8T
├─sda1 -> md0 (/)
├─sda2 -> md1 (swap)
└─sda3 -> md126 /NG-WDRED-2TB-1
sdb 5.5T
├─sdb1 -> md0 (/)
├─sdb2 -> md1 (swap)
└─sdb3 -> md127 /NG-WDRP-6TB-1
sdc 2.7T
├─sdc1 -> md0
├─sdc2 -> md1
└─sdc3 -> md125 /NG-WDRED-3TB-2
sdd 7.3T
├─sdd1 -> md0
├─sdd2 -> md1
└─sdd3 -> md124 /NG-8TB-Seagate

/proc/mdstat
md124 : active raid1 sdd3
7809175808 blocks super 1.2 [1/1] [U]

md125 : active raid1 sdc3
2925415808 blocks super 1.2 [1/1] [U]

md126 : active raid1 sda3
1948663808 blocks super 1.2 [1/1] [U]

md127 : active raid1 sdb3
5855671808 blocks super 1.2 [1/1] [U]

md1 : active raid10 sda2 sdd2 sdc2 sdb2
1044480 blocks super 1.2 512K chunks 2 near-copies [4/4] [UUUU]

md0 : active raid1 sda1 sdb1 sdd1 sdc1
4190208 blocks super 1.2 [4/4] [UUUU]

/root/mdadm-detail-scan.txt
ARRAY /dev/md/0 metadata=1.2 name=0e34093c:0 UUID=b1079eff:ca275c6a:4df7d648:6f176c9c
ARRAY /dev/md/1 metadata=1.2 name=0e34093c:1 UUID=9ecdbab8:7ecf3da9:299f9966:0fa46d04
ARRAY /dev/md/NG-WDRP-6TB-1-0 metadata=1.2 name=0e34093c:NG-WDRP-6TB-1-0 UUID=1d40ffff:601db1f8:20e41e54:f5650fa6
ARRAY /dev/md/NG-WDRED-2TB-1-0 metadata=1.2 name=0e34093c:NG-WDRED-2TB-1-0 UUID=d69ab251:67e359ac:16c640ee:2a0409c0
ARRAY /dev/md/NG-WDRED-3TB-2-0 metadata=1.2 name=0e34093c:NG-WDRED-3TB-2-0 UUID=1c072ab5:ea01a5d6:646d6d07:76776925
ARRAY /dev/md/NG-8TB-Seagate-0 metadata=1.2 name=0e34093c:NG-8TB-Seagate-0 UUID=4a957007:c3c04e0b:0aacb1df:3a59d9e8

/root/btrfs-filesystems.txt
Label: '0e34093c:NG-WDRP-6TB-1' uuid: 28fcc8ab-9e63-4529-83f4-1e9d4708bd1b
Total devices 1 FS bytes used 4.27TiB
devid 1 size 5.45TiB used 4.28TiB path /dev/md127

Label: '0e34093c:NG-8TB-Seagate' uuid: 2a912336-755a-48e6-bcee-fd373ae8e6df
Total devices 1 FS bytes used 2.63TiB
devid 1 size 7.27TiB used 2.64TiB path /dev/md124

Label: '0e34093c:NG-WDRED-3TB-2' uuid: fbd95853-4f22-4041-8583-4e0853decf9b
Total devices 1 FS bytes used 1.17TiB
devid 1 size 2.72TiB used 1.17TiB path /dev/md125

Label: '0e34093c:NG-WDRED-2TB-1' uuid: 1b34cda6-1cc8-4360-9ca6-4c209100aa48
Total devices 1 FS bytes used 200.08GiB
devid 1 size 1.81TiB used 220.02GiB path /dev/md126

So from the RAID/Btrfs point of view, everything looks consistent: four md data arrays, four Btrfs filesystems, all mounted and in use. There is no extra md device and no Btrfs filesystem corresponding to the blue “RAID unknown” ghost NG-8TB-Seagate volume.

What I’ve tried:

• Using the GUI “Destroy” on the blue NG-WDRED-3TB-1 volume: it disappears briefly but comes back.
• Running btrfs scrub on the real NG-8TB-Seagate volume.
• Restarting services and rebooting; the ghost entries and the Inactive/Unprotected log spam persist.

What I’m asking for:
I’d like guidance on how to safely clean up the configuration/database so that the ghost NG-8TB-Seagate and NG-WDRED-3TB-1 volumes are removed from the ReadyNAS UI and stop generating volume-health events, without destroying the real md124/md125/md126/md127 arrays or their Btrfs filesystems.

I’m comfortable with SSH and sqlite3 if needed, but I don’t know the internal ReadyNAS schema, so I’d really appreciate precise instructions like:

• which DB file to open;
• which table(s)/row(s) represent these phantom volumes;
• exactly what to delete/change;
• and which services to restart afterwards.

I do have backups of the most critical data, but I’d obviously prefer not to wipe and rebuild the entire box just to clear two stale volume objects.

Thanks in advance for any pointers.